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题名: Direct detection of a break in the teraelectronvolt cosmic-ray spectrum of electrons and positrons
作者: G. Ambrosi; Q. An; R. Asfandiyarov; P. Azzarello; P. Bernardini; B. Bertucci; M. S. Cai; J. Chang; D. Y. Chen; H. F. Chen; J. L. Chen; W. Chen; M. Y. Cui; T. S. Cui; A. D’Amone; A. De Benedittis; I. De Mitri; M. Di Santo; J. N. Dong; T. K. Dong; Y. F. Dong; Z. X. Dong; G. Donvito; D. Droz; K. K. Duan; J. L. Duan; M. Duranti; D. D’Urso; R. R. Fan; Y. Z. Fan; F. Fang; C. Q. Feng; L. Feng; P. Fusco; V. Gallo; F. J. Gan; M. Gao; S. S. Gao; F. Gargano; S. Garrappa; K. Gong; Y. Z. Gong; D. Y. Guo; J. H. Guo; Y. M. Hu; G. S. Huang; Y. Y. Huang; M. Ionica; D. Jiang; W. Jiang; X. Jin; J. Kong; S. J. Lei; S. Li; X. Li; W. L. Li; Y. Li; Y. F. Liang; Y. M. Liang; N. H. Liao; H. Liu; J. Liu; S. B. Liu; W. Q. Liu; Y. Liu; F. Loparco; M. Ma; P. X. Ma; S. Y. Ma; T. Ma; X. Q. Ma; X. Y. Ma; G. Marsella; M. N. Mazziotta; D. Mo; X. Y. Niu; X. Y. Peng; W. X. Peng; R. Qiao; J. N. Rao; M. M. Salinas; G. Z. Shang; W. H. Shen; Z. Q. Shen; Z. T. Shen; J. X. Song; H. Su; M. Su; Z. Y. Sun; A. Surdo; X. J. Teng; X. B. Tian; A. Tykhonov; V. Vagelli; S. Vitillo; C. Wang; H. Wang; H. Y. Wang; J. Z. Wang; L. G. Wang; Q. Wang; S. Wang; X. H. Wang; X. L. Wang; Y. F. Wang; Y. P. Wang; Y. Z. Wang; S. C. Wen; Z. M. Wang; D. M. Wei; J. J. Wei; Y. F. Wei; D. Wu; J. Wu; L. B. Wu; S. S. Wu; X. Wu; K. Xi; Z. Q. Xia; Y. L. Xin; H. T. Xu; Z. L. Xu; Z. Z. Xu; G. F. Xue; H. B. Yang; P. Yang; Y. Q. Yang; Z. L. Yang; H. J. Yao; Y. H. Yu; Q. Yuan; C. Yue; J. J. Zang; C. Zhang; D. L. Zhang; F. Zhang; J. B. Zhang; J. Y. Zhang; J. Z. Zhang; L. Zhang; P. F. Zhang; S. X. Zhang; W. Z. Zhang; Y. Zhang; Y. J. Zhang; Y. Q. Zhang; Y. L. Zhang; Y. P. Zhang; Z. Zhang; Z. Y. Zhang; H. Zhao; H. Y. Zhao; X. F. Zhao; C. Y. Zhou; Y. Zhou; X. Zhu; Y. Zhu & S. Zimmer
作者部门: 空间技术部
关键词: PARTICLE DARK-MATTER ; SUPERNOVA-REMNANTS ; DAMPE ; PROPAGATION ; CANDIDATES ; SIGNATURE ; ENERGIES ; GALAXY
刊名: Nature
ISSN号: 0028-0836
出版日期: 2017
收录类别: SCI
英文摘要: High-energy cosmic-ray electrons and positrons (CREs), which lose energy quickly during their propagation, provide a probe of Galactic high-energy processes(1-7) and may enable the observation of phenomena such as dark-matter particle annihilation or decay(8-10). The CRE spectrum has been measured directly up to approximately 2 teraelectronvolts in previous balloon-or space-borne experiments(11-16), and indirectly up to approximately 5 teraelectronvolts using ground-based Cherenkov gamma-ray telescope arrays(17,18). Evidence for a spectral break in the teraelectronvolt energy range has been provided by indirect measurements(17,18), although the results were qualified by sizeable systematic uncertainties. Here we report a direct measurement of CREs in the energy range 25 gigaelectronvolts to 4.6 teraelectronvolts by the Dark Matter Particle Explorer (DAMPE)(19) with unprecedentedly high energy resolution and low background. The largest part of the spectrum can be well fitted by a 'smoothly broken power-law' model rather than a single power-law model. The direct detection of a spectral break at about 0.9 teraelectronvolts confirms the evidence found by previous indirect measurements(17,18), clarifies the behaviour of the CRE spectrum at energies above 1 teraelectronvolt and sheds light on the physical origin of the sub-teraelectronvolt CREs.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.nssc.ac.cn/handle/122/6041
Appears in Collections:空间技术部_期刊论文

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Recommended Citation:
G. Ambrosi,Q. An,R. Asfandiyarov,et al. Direct detection of a break in the teraelectronvolt cosmic-ray spectrum of electrons and positrons[J]. Nature,2017.
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